Transcript Computers Are Your Future

Computers Are
Your Future
© 2008 Prentice-Hall, Inc.
Computers Are Your Future Spotlight 3
Computers Are Your Future
Spotlight 3
Home Networks
© 2008 Prentice-Hall, Inc.
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Computers Are Your Future Spotlight 3
Home Networks
 2/3 of all households own a computer.
 20 million households have more than one computer.
 Multi-computer households:
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Can share data
Can share scanners and printers
Can share a single Internet connection
© 2008 Prentice-Hall, Inc.
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Computers Are Your Future Spotlight 3
Home Networks
A home network enables users to quickly and
conveniently share files and resources using network
connections between computers and peripheral devices.
© 2008 Prentice-Hall, Inc.
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Computers Are Your Future Spotlight 3
Home Ethernet Networks
Ethernet is a communications standard that specifies
how physically connected computers in a network
send data.
 Send data in packets, over wires
 Most popular wiring is twisted pair
 CAT-3
 CAT-5
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Computers Are Your Future Spotlight 3
Home Ethernet Networks
 A hub is an external
communications device with
multiple connectors (ports).
 An Ethernet network adaptor
or home interface card (NIC)
is an internal
communications device that
uses electrical signals to
communicate.
© 2008 Prentice-Hall, Inc.
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Home Ethernet Networks
 A switch is like a hub, but more efficient.
 A switch knows about all computers connected to it
and transmits data only to the computer to which the
data is addressed.
© 2008 Prentice-Hall, Inc.
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Home Phone-Line Networks
Use a home’s existing telephone
wiring:
 Simple installation
 Reliability
 Compatible with other home
networking technologies
 Works with all computer makes
and models
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Home Phone-Line Networks
Disadvantages
 Special hardware/software may be needed
 May need to install home phone-line NIC
 May need to run new phone wiring
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Computers Are Your Future Spotlight 3
Home Power-Line Networks
Uses existing electrical wiring
 Inexpensive and easy to install
 Peripherals can be located anywhere
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Computers Are Your Future Spotlight 3
Home Power-Line Networks
Disadvantages
 Need 110-volt electrical wiring
 Takes up a lot of space
 Connection speeds are slow
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Wireless Home Networks
 HomeRF
 Wi-Fi
 Three factors to determine which type you want
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Cost of hardware/software
Speed of data
Range within which you can transmit
between devices
© 2008 Prentice-Hall, Inc.
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Computers Are Your Future Spotlight 3
Home Radio-Frequency Networks
 Home RF systems are wireless networks in which
each computer on the network broadcasts its
information to another using radio signals.
 Network access points send and receive data
between computers.
© 2008 Prentice-Hall, Inc.
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Computers Are Your Future Spotlight 3
Home Radio-Frequency Networks
 Peer-to-peer relationship exists among all
computers in the network.
 Three standards:
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802.11b
802.11a
802.11g
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Computers Are Your Future Spotlight 3
Home Wi-Fi Networks
Ad hoc:
 No access point or server
 Wireless data exchange cards
Client/server:
 2.4 GHz
 Recommended for Macs
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Planning
 What are you trying to accomplish with your
network?
 Small business or personal use?
 One computer or many?
 Hardware in one room or many?
 What wiring technology will you use?
 What hardware/software do you need to buy?
© 2008 Prentice-Hall, Inc.
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Configuration
 Designate PCs that will be part of the network.
 Install the hardware and software.
 Designate how files, folders, peripherals, and
Internet connection will be shared.
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Computers Are Your Future Spotlight 3
Maintenance and Support
Set up a regular maintenance schedule.
 Clean dust and lint from around router.
 Clean contacts on network cards.
 Refresh network settings.
© 2008 Prentice-Hall, Inc.
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The Future of Home Networking
 Convergence:
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Using home networks to control appliances
Home security
Central control unit
 Wireless Technologies
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